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首页> 外文期刊>Hydrological ProcHydrological Processesrnesses >A tracer‐based assessment of hydrological pathways at different spatial scales in a mesoscale Scottish catchment
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A tracer‐based assessment of hydrological pathways at different spatial scales in a mesoscale Scottish catchment

机译：基于示踪剂的苏格兰中流域不同空间尺度的水文路径评估

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摘要

Geochemically based hydrograph separation techniques were used in a preliminary assessment to infer how runoff processes change with landscape characteristics and spatial scale (1–233 km) within a mesoscale catchment in upland Scotland. A two-component end-member mixing analysis (EMMA) used Gran alkalinity as an assumed conservative tracer. Analysis indicated that, at all scales investigated, acidic overland flow and shallow subsurface storm flows from the peaty soils covering the catchment headwaters dominated storm runoff generation. The estimated groundwater contribution to annual runoff varied from 30% in the smallest ( 1 km) peat-dominated headwater catchment with limited groundwater storage, to >60% in larger catchments (>30 km) with greater coverage of more freely draining soils and more extensive aquifers in alluvium and other drift. This simple approach offers a useful, integrated conceptualization of the hydrological functioning in a mesoscale catchment, which can be tested and further refined by focused modelling and process-based research. However, even as it stands, the simple conceptualization of system behaviour will have significant utility as a tool for communicating hydrological issues in a range of planning and management decisions. Copyright © 2002 John Wiley & Sons, Ltd.
机译：在初步评估中，使用了基于地球化学的水文分离技术来推断苏格兰中陆流域内径流过程如何随景观特征和空间尺度（1-233 km）变化。两组分末端成员混合分析（EMMA）使用格兰碱度作为假定的保守示踪剂。分析表明，在所有调查的尺度上，覆盖集水区上游水域的豌豆土的酸性陆上径流和浅层地下雨水流都是雨水径流的主要来源。估计的地下水对年径流量的贡献范围从最小的（1 km）以泥炭为主的上游水域（有限的地下水储存）为30％，到较大的集水区（> 30 km）为60％以上，覆盖范围更广，排水更自由，土壤更多。冲积层和其他漂流中的大量含水层。这种简单的方法为中尺度流域的水文功能提供了有用的集成概念，可以通过集中建模和基于过程的研究对其进行测试和进一步完善。但是，就目前情况而言，系统行为的简单概念化将作为在一系列规划和管理决策中传达水文问题的工具，具有巨大的实用性。版权所有©2002 John Wiley＆Sons，Ltd.

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    Soulsby C.; Rodgers P.; Smart R.; Dawson J.; Dunn S.;

  • 作者单位

    Department of Geography and Environment University of Aberdeen Aberdeen AB24 3UF UK. Department of Geography and Environment University of Aberdeen Elphonstone Road Aberdeen AB24 3UF UK.;

    Department of Geography and Environment University of Aberdeen Aberdeen AB24 3UF UK;

    Department of Environment University of York York YO10 5DD UK;

    Department of Plant and Soil Science University of Aberdeen Aberdeen AB24 3UU UK;

    Macaulay Institute Craigiebuckler Aberdeen AB15 8QH UK;

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  • 正文语种 eng
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  • 关键词

    hydrology; runoff processes; flow paths; EMMA; catchment; Scotland;

    机译：水文学径流过程流径EMMA流域苏格兰;

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